Product Category: Dog muzzle Material: soft plastic (environmental protection and non toxic) Size: mouth length 3.15 inches, mouth circumference 10.62inches, head circumference 15.15 19.68 inches Weight: 4.6oz Measurement methods: Mouth length: the distance from the eyes to the tip of the nose Mouth circumference: the circumference of a circle around the dogs mouth Head circumference: the circumference of the chin around the head Note: Please measure the dog s mouth length, mouth circumference and head circumference before buying to make sure it can be used after purchase.